The word(s) "enlightening" appears 4 time(s) in 4 verse(s) in Quran in Saheeh International translation.

(1) Then if they deny you, [O Muhammad] - so were messengers denied before you, who brought clear proofs and written ordinances and the enlightening Scripture.

(2) And of the people is he who disputes about Allah without knowledge or guidance or an enlightening book [from Him],

(3) Do you not see that Allah has made subject to you whatever is in the heavens and whatever is in the earth and amply bestowed upon you His favors, [both] apparent and unapparent? But of the people is he who disputes about Allah without knowledge or guidance or an enlightening Book [from Him].

(4) And if they deny you - then already have those before them denied. Their messengers came to them with clear proofs and written ordinances and with the enlightening Scripture.